On Wed, Jul 11, 2018 at 02:53:23PM +0200, SZEDER Gábor wrote: > > I.e., could we have a situation where we make a request, the client > > finishes, and then we look at the logs, but nothing has been written by > > apache yet? > > That's possible, I suppose. Highly improbable, but possible. Or the > log entries can be written only partially by the time we look at them. Digging into earlier cases I had seen on my local box, my impression was that this was the problem I was seeing (not reordering). But it's entirely possible that I was confused by reordering. I've been trying to reproduce, but after 5 minutes of t5561 running in a tight loop under high load, I haven't gotten a single failure. > Anyway, I would prefer not to do anything about it just yet, because > I'm curious :) and I'd like to see whether this actually happens in > practice. I can't reproduce for now, so I'm happy either way. :) > > What if the test script provides the in-order expectation, but we check > > only the unordered version (by sorting both actual and expected output > > on the fly)? That would give us a more relaxed check most of the time, > > but somebody digging in to a failure could run the ordered diff (or we > > could even show it automatically on failure instead of just using > > test_cmp). > > this is the fix I'll go for in v2. Great. That seems much simpler to reason about. I'll take a look. -Peff
